<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 5.1.6 or newer
 *
 * @package		CodeIgniter
 * @author		ExpressionEngine Dev Team
 * @copyright	Copyright (c) 2008 - 2011, EllisLab, Inc.
 * @license		http://codeigniter.com/user_guide/license.html
 * @link		http://codeigniter.com
 * @since		Version 1.0
 * @filesource
 */

// ------------------------------------------------------------------------

/**
 * CodeIgniter String Helpers
 *
 * @package		CodeIgniter
 * @subpackage	Helpers
 * @category	Helpers
 * @author		ExpressionEngine Dev Team
 * @link		http://codeigniter.com/user_guide/helpers/string_helper.html
 */

// ------------------------------------------------------------------------

/**
 * Trim Slashes
 *
 * Removes any leading/trailing slashes from a string:
 *
 * /this/that/theother/
 *
 * becomes:
 *
 * this/that/theother
 *
 * @access	public
 * @param	string
 * @return	string
 */
if ( ! function_exists('trim_slashes'))
{
	function trim_slashes($str)
	{
		return trim($str, '/');
	}
}

// ------------------------------------------------------------------------

/**
 * Strip Slashes
 *
 * Removes slashes contained in a string or in an array
 *
 * @access	public
 * @param	mixed	string or array
 * @return	mixed	string or array
 */
if ( ! function_exists('strip_slashes'))
{
	function strip_slashes($str)
	{
		if (is_array($str))
		{
			foreach ($str as $key => $val)
			{
				$str[$key] = strip_slashes($val);
			}
		}
		else
		{
			$str = stripslashes($str);
		}

		return $str;
	}
}

// ------------------------------------------------------------------------

/**
 * Strip Quotes
 *
 * Removes single and double quotes from a string
 *
 * @access	public
 * @param	string
 * @return	string
 */
if ( ! function_exists('strip_quotes'))
{
	function strip_quotes($str)
	{
		return str_replace(array('"', "'"), '', $str);
	}
}

// ------------------------------------------------------------------------

/**
 * Quotes to Entities
 *
 * Converts single and double quotes to entities
 *
 * @access	public
 * @param	string
 * @return	string
 */
if ( ! function_exists('quotes_to_entities'))
{
	function quotes_to_entities($str)
	{
		return str_replace(array("\'","\"","'",'"'), array("&#39;","&quot;","&#39;","&quot;"), $str);
	}
}

// ------------------------------------------------------------------------

/**
 * Reduce Double Slashes
 *
 * Converts double slashes in a string to a single slash,
 * except those found in http://
 *
 * http://www.some-site.com//index.php
 *
 * becomes:
 *
 * http://www.some-site.com/index.php
 *
 * @access	public
 * @param	string
 * @return	string
 */
if ( ! function_exists('reduce_double_slashes'))
{
	function reduce_double_slashes($str)
	{
		return preg_replace("#(^|[^:])//+#", "\\1/", $str);
	}
}

// ------------------------------------------------------------------------

/**
 * Reduce Multiples
 *
 * Reduces multiple instances of a particular character.  Example:
 *
 * Fred, Bill,, Joe, Jimmy
 *
 * becomes:
 *
 * Fred, Bill, Joe, Jimmy
 *
 * @access	public
 * @param	string
 * @param	string	the character you wish to reduce
 * @param	bool	TRUE/FALSE - whether to trim the character from the beginning/end
 * @return	string
 */
if ( ! function_exists('reduce_multiples'))
{
	function reduce_multiples($str, $character = ',', $trim = FALSE)
	{
		$str = preg_replace('#'.preg_quote($character, '#').'{2,}#', $character, $str);

		if ($trim === TRUE)
		{
			$str = trim($str, $character);
		}

		return $str;
	}
}

// ------------------------------------------------------------------------

/**
 * Create a Random String
 *
 * Useful for generating passwords or hashes.
 *
 * @access	public
 * @param	string	type of random string.  basic, alpha, alunum, numeric, nozero, unique, md5, encrypt and sha1
 * @param	integer	number of characters
 * @return	string
 */
if ( ! function_exists('random_string'))
{
	function random_string($type = 'alnum', $len = 8)
	{
		switch($type)
		{
			case 'basic'	: return mt_rand();
				break;
			case 'alnum'	:
			case 'numeric'	:
			case 'nozero'	:
			case 'alpha'	:

					switch ($type)
					{
						case 'alpha'	:	$pool = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
							break;
						case 'alnum'	:	$pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
							break;
						case 'numeric'	:	$pool = '0123456789';
							break;
						case 'nozero'	:	$pool = '123456789';
							break;
					}

					$str = '';
					for ($i=0; $i < $len; $i++)
					{
						$str .= substr($pool, mt_rand(0, strlen($pool) -1), 1);
					}
					return $str;
				break;
			case 'unique'	:
			case 'md5'		:

						return md5(uniqid(mt_rand()));
				break;
			case 'encrypt'	:
			case 'sha1'	:

						$CI =& get_instance();
						$CI->load->helper('security');

						return do_hash(uniqid(mt_rand(), TRUE), 'sha1');
				break;
		}
	}
}

// ------------------------------------------------------------------------

/**
 * Add's _1 to a string or increment the ending number to allow _2, _3, etc
 *
 * @param   string  $str  required
 * @param   string  $separator  What should the duplicate number be appended with
 * @param   string  $first  Which number should be used for the first dupe increment
 * @return  string
 */
function increment_string($str, $separator = '_', $first = 1)
{
	preg_match('/(.+)'.$separator.'([0-9]+)$/', $str, $match);

	return isset($match[2]) ? $match[1].$separator.($match[2] + 1) : $str.$separator.$first;
}

// ------------------------------------------------------------------------

/**
 * Alternator
 *
 * Allows strings to be alternated.  See docs...
 *
 * @access	public
 * @param	string (as many parameters as needed)
 * @return	string
 */
if ( ! function_exists('alternator'))
{
	function alternator()
	{
		static $i;

		if (func_num_args() == 0)
		{
			$i = 0;
			return '';
		}
		$args = func_get_args();
		return $args[($i++ % count($args))];
	}
}

// ------------------------------------------------------------------------

/**
 * Repeater function
 *
 * @access	public
 * @param	string
 * @param	integer	number of repeats
 * @return	string
 */
if ( ! function_exists('repeater'))
{
	function repeater($data, $num = 1)
	{
		return (($num > 0) ? str_repeat($data, $num) : '');
	}
}

/**
 * RemoveSign function
 * 
 * @access  public
 * @param   string
 * @return  string
 */
if ( ! function_exists('remove_sign')){
	function remove_sign($data){
        $trans = array ('à' => 'a', 'á' => 'a', 'ả' => 'a', 'ã' => 'a', 'ạ' => 'a', 
        				'À' => 'a', 'Á' => 'a', 'Ả' => 'a', 'Ã' => 'a', 'Ạ' => 'a',
        				'â' => 'a', 'ấ' => 'a', 'ầ' => 'a', 'ẫ' => 'a', 'ẩ' => 'a', 'ậ' => 'a',
        				'Â' => 'a', 'Ấ' => 'a', 'Ầ' => 'a', 'Ẫ' => 'a', 'Ẩ' => 'a', 'Ậ' => 'a',
        				'ă' => 'a', 'ắ' => 'a', 'ằ' => 'a', 'ẵ' => 'a', 'ẳ' => 'a', 'ặ' => 'a',
        				'Ă' => 'a', 'Ắ' => 'a', 'Ằ' => 'a', 'Ẵ' => 'a', 'Ẳ' => 'a', 'Ặ' => 'a',   
        				'ù' => 'u', 'ú' => 'u', 'ủ' => 'u', 'ũ' => 'u', 'ụ' => 'u', '̣' => '',
        				'Ù' => 'u', 'Ú' => 'u', 'Ủ' => 'u', 'Ũ' => 'u', 'Ụ' => 'u', '̀' => '',
        				'ư' => 'u', 'ừ' => 'u', 'ứ' => 'u', 'ử' => 'u', 'ữ' => 'u', 'ự' => 'u',
        				'Ư' => 'u', 'Ừ' => 'u', 'Ứ' => 'u', 'Ử' => 'u', 'Ữ' => 'u', 'Ự' => 'u',
        				'ò' => 'o', 'ó' => 'o', 'ỏ' => 'o', 'õ' => 'o', 'ọ' => 'o',
        				'Ò' => 'o', 'Ó' => 'o', 'Ỏ' => 'o', 'Õ' => 'o', 'Ọ' => 'o',
        				'ô' => 'o', 'ồ' => 'o', 'ố' => 'o', 'ổ' => 'o', 'ỗ' => 'o', 'ộ' => 'o',
        				'Ô' => 'o', 'Ồ' => 'o', 'Ố' => 'o', 'Ổ' => 'o', 'Ỗ' => 'o', 'Ộ' => 'o',
        				'ơ' => 'o', 'ờ' => 'o', 'ớ' => 'o', 'ở' => 'o', 'ỡ' => 'o', 'ợ' => 'o',
        				'Ơ' => 'o', 'Ờ' => 'o', 'Ớ' => 'o', 'Ở' => 'o', 'Ỡ' => 'o', 'Ợ' => 'o',
        				'ì' => 'i', 'í' => 'i', 'ỉ' => 'i', 'ĩ' => 'i', 'ị' => 'i',
        				'Ì' => 'i', 'Í' => 'i', 'Ỉ' => 'i', 'Ĩ' => 'i', 'Ị' => 'i',
        				'đ' => 'd',
        				'Đ' => 'd',
        				'è' => 'e', 'é' => 'e', 'ẻ' => 'e', 'ẽ' => 'e', 'ẹ' => 'e',
        				'È' => 'e', 'É' => 'e', 'Ẻ' => 'e', 'Ẽ' => 'e', 'Ẹ' => 'e',
        				'ê' => 'e', 'ề' => 'e', 'ế' => 'e', 'ể' => 'e', 'ễ' => 'e', 'ệ' => 'e',
        				'Ê' => 'e', 'Ề' => 'e', 'Ế' => 'e', 'Ể' => 'e', 'Ễ' => 'e', 'Ệ' => 'e', 
         				'ỳ' => 'y', 'ý' => 'y', 'ỷ' => 'y', 'ỹ' => 'y', 'ỵ' => 'y',
         				'Ỳ' => 'y', 'Ý' => 'y', 'Ỷ' => 'y', 'Ỹ' => 'y', 'Ỵ' => 'y'
                       );
        return strtolower(strtr($data, $trans ));
		
	}
}


/**
 * makeAlias function
 * convert a string to it's alias which is link of friendly url 
 * 
 * @access  public
 * @param   string
 * @return  string
 */
if ( ! function_exists('make_alias')){
	function make_alias($string){
		$alias = remove_sign(trim($string));
		$tran = array(
            ' – ' => '-',
			' - ' => '-',
			' '	=> '-',
			'(' => '',
			')' => '',
			'"' => '',
			'\'' => '',
            '“' => '',
            '”' => '',
            '/' => '',
            'Đ' => 'd',
            'đ' => 'd',
            '?' => '',
            '!' => '',
            '.' => '',
            '’' => '',
            '‘' => '',
            '.' => '',
            ',' => '',
            ':' => '',
            '%' => '-phan-tram', //vd: tang 10% hoc phi...
			'#' => '',
			'&' => '',
			'@'	=> '',
			'$'	=> '',
			'^'	=> '',
			'*'	=> '',
			'+'	=> '',
			'='	=> ''
		);
		return strtr($alias,$tran); 
	}

}

/* End of file string_helper.php */
/* Location: ./system/helpers/string_helper.php */